MdePkg/Library/BaseCpuLib/Arm/CpuSleep.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; CpuSleep() for ARM
   4 ;
   5 ; Copyright (c) 2006 - 2009, Intel Corporation. All rights reserved.<BR>
   6 ; Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   7 ; This program and the accompanying materials
   8 ; are licensed and made available under the terms and conditions of the BSD License
   9 ; which accompanies this distribution.  The full text of the license may be found at
  10 ; http://opensource.org/licenses/bsd-license.php
  11 ;
  12 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  13 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  14 ;
  15 ;------------------------------------------------------------------------------
  16
  17   EXPORT CpuSleep
  18   AREA cpu_sleep, CODE, READONLY
  19
  20 ;/**
  21 ;  Places the CPU in a sleep state until an interrupt is received.
  22 ;
  23 ;  Places the CPU in a sleep state until an interrupt is received. If interrupts
  24 ;  are disabled prior to calling this function, then the CPU will be placed in a
  25 ;  sleep state indefinitely.
  26 ;
  27 ;**/
  28 ;VOID
  29 ;EFIAPI
  30 ;CpuSleep (
  31 ;  VOID
  32 ;  );
  33 ;
  34 CpuSleep
  35     MOV r0,#0
  36     MCR p15,0,r0,c7,c0,4   ;Wait for Interrupt instruction
  37     BX LR
  38
  39   END